Lost Keys — Same-Visit Rekey: step by step

A missing key is also the moment a household can stop carrying four. Because a rekey sets a fresh combination in every cylinder anyway, the locksmith can set the same combination in all of them, provided they share a keyway family, so the front door, back door, garage entry and side gate open with one key. Where a cylinder belongs to a different family, it can be swapped for one that matches during the same visit. The result is a single key on each ring, fewer copies to keep track of, and the certainty that the lost one operates none of them.

Reading each cylinder before it comes off the door

Every cylinder on the list gets a close look while it is still in the door. The keyway shape and the maker's stamp tell the locksmith which pin kit fits and whether the keys can be cut on the van. The feel of the plug with a working key, if one exists, says whether the pins and springs are healthy or tired. Corrosion on the face, a wobbly plug or a key that needs a jiggle points to a cylinder that will benefit from cleaning or replacing while it is out. A homeowner-rekeyable cylinder, recognisable by its small reset slot beside the keyway, calls for a different tool and gets noted.

Cutting the new keys on site

Common keys are cut on the van rather than ordered in, though some restricted systems need the blank from an authorised distributor first. The first key is cut on a code machine, a crisp, original-depth key rather than a copy of a copy, and tried in the first repinned cylinder before another is touched, so any adjustment happens once. The rest are cut to the same code, deburred, and tested in turn. Keys cut this way run smoothly from the start and stay accurate through years of copying, because every later duplicate can be made from the code rather than from a worn blade.

One key on the ring

If the house was keyed alike during the visit, the ring that goes back in your pocket is lighter. One key opens the front door, the back door, the garage entry and the gate. Each family member carries one thing instead of a jangle, and the question of which key goes to the dog walker has one answer. New doors added later, a shed or a workshop, can be pinned to the same code when they are installed. Guests and sitters find the arrangement easier too, and a single key is a good deal harder to lose than a bunch.